PCA) Report Name Mosquito Range Site Code S.USCOHP*375
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Level 4 Potential Conservation Area (PCA) Report Name Mosquito Range Site Code S.USCOHP*375 IDENTIFIERS Site ID 342 Site Class PCA Site Alias Mosquito Peaks Cirques Macrosite Site Alias Hoosier Ridge Macrosite Site Alias Tenmile Macrosite Site Alias Mosquito Peaks Megasite Network of Conservation Areas (NCA) NCA Site ID NCA Site Code NCA Site Name - No Data County SITE DESCRIPTION Site Description This site incorporates nearly the entire alpine area of the Mosquito Range. The predominant habitats are characterized by alpine meadows, rock outcrops, scree slopes, boulder fields, alpine lakes, willow carrs, snowmelt streamlets, and permanent snow fields. Snow melt flows down the north and south-facing slopes in intermittent drainages from the top of the ridges. The slopes are typified by tufted hairgrass / golden avens (Deschampsia cespitosa / Geum rossii) and kobresia / golden avens (Kobresia myosuroides / Geum rossii) communities, with scattered patches of willows (Salix glauca and Salix brachycarpa) and krummholz Engelmann spruce (Picea engelmannii). Moist areas with mossy ground cover provide the necessary habitat for Penland alpine fen mustard (Eutrema penlandii), which is one of the elements of primary importance in this site. This site supports an extraordinarily high concentration of rare plant species. To date, 20 globally rare plant species and several state rare species have been documented within this site. High elevation outcrops of Leadville Limestone are said to be a predominant factor in setting the stage for such high densities of rare plant species. Many of the rarest plants in this site, including Penland alpine fen mustard, are thought to be restricted to this geologic substrate. Several 14,000 foot peaks occur in the site and this area is known for its gold mining at the turn of the 1900 century. Evidence of historic mining is prevalent in some areas while other areas are little affected. Particularly exemplary areas within this large site include Hoosier Ridge, North Star Mountain, and Blue Lakes. Key Environmental Factors Blue Lakes, located in Summit County near the Park and Lake county lines, are reservoirs that have been created by the town of Colorado Springs. Climate Description No Data Land Use History No Data Cultural Features No Data Minimum Elevation 10,500.00 Feet 3,200.00 Meters Maximum Elevation 14,200.00 Feet 4,328.00 Meters SITE DESIGN Site Map Y - Yes Mapped Date 03/30/2001 Designer Spackman, S.C. Boundary Justification The boundary includes all known elements and potential conservation areas in the Mosquito Range alpine zone. This boundary is thought to incorporate a large enough area to support all of the ecological processes of the Mosquito Range. This area will provide suitable habitat where additional individuals can become established over time. In the Blue Lakes area, the site includes the reservoir spillway, which is vital to the survival of Draba weberi. Primary Area 105,323.30 Acres 42,623.00 Hectares Copyright © 2018. Colorado State University. Colorado Natural Heritage Program. All Rights Reserved. Print Date 3/3/2018 1 Level 4 Potential Conservation Area (PCA) Report Name Mosquito Range Site Code S.USCOHP*375 SITE SIGNIFICANCE Biodiversity Significance Rank B1: Outstanding Biodiversity Significance Biodiversity Significance Comments This site supports all the known occurrences in the world for two imperiled (G4T1T2) and critically imperiled (G1) plants: Mosquito Range mustard (Eutrema edwardsii ssp. penlandii) and Weber's draba (Draba weberi). The site includes several excellent (A-ranked) and good (B-ranked) occurrences of Mosquito Range mustard (federally listed as a threatened species) and the only known occurrence in the world of Weber's draba. The Mosquito Range is one of the botanical "hotspots" in Colorado. There are few other areas in the state supporting the number and rarity of plant species found here. Nine globally imperiled (G2) plant species occur within the site including globe gilia (Ipomopsis globularis), another very narrowly restricted species found in this site and nowhere else in the world. Weber saussurea ( Saussurea weberi) (G2) is known from Summit and Park counties in Colorado, northern Wyoming, and western Montana but is considered to be rare throughout its range. An additional nine globally vulnerable (G3) plant species occur within the site as well as several state rare species. Many of the globally common (G5) but state rare (S1or S2) species that are found here are disjunct from arctic distributions, such as Sea pink ( Armeria maritima ssp. sibirica), which is absent between Alaska/Northern Territories and Colorado and then occurs in a few alpine sites in our state. The Polixenes arctic butterfly is also known from this area as well as several globally and/or state imperiled plant communities. The Lynx and Wolverine are known here from historical documentation. Other Values Rank No Data Other Values Comments No Data ASSOCIATED ELEMENTS OF BIODIVERSITY Element Global State Driving State ID State Scientific Name State Common Name Rank Rank Site Rank 16702 Delphinium ramosum var. alpestre Colorado larkspur G2 S2 N 17560 Draba incerta Yellowstone whitlow-grass G5 S1 N 17753 Castilleja puberula Downy indian-paintbrush G2G3 S2S3 N 17794 Draba grayana Gray's Peak whitlow-grass G2 S2 N 17794 Draba grayana Gray's Peak whitlow-grass G2 S2 N 17794 Draba grayana Gray's Peak whitlow-grass G2 S2 N 17794 Draba grayana Gray's Peak whitlow-grass G2 S2 N 19134 Draba borealis northern rockcress G4G5 S2 N 19134 Draba borealis northern rockcress G4G5 S2 N 19134 Draba borealis northern rockcress G4G5 S2 N 19637 Saussurea weberi Weber saussurea G2G3 S2 N 18092 Aquilegia saximontana Rocky Mountain columbine G3 S3 N 18092 Aquilegia saximontana Rocky Mountain columbine G3 S3 N 18092 Aquilegia saximontana Rocky Mountain columbine G3 S3 N 18546 Armeria scabra ssp. sibirica sea pink G5T5 S1 N 18813 Draba exunguiculata clawless draba G2 S2 N 18813 Draba exunguiculata clawless draba G2 S2 N 19637 Saussurea weberi Weber saussurea G2G3 S2 N 19637 Saussurea weberi Weber saussurea G2G3 S2 N 19637 Saussurea weberi Weber saussurea G2G3 S2 N 19637 Saussurea weberi Weber saussurea G2G3 S2 N 19637 Saussurea weberi Weber saussurea G2G3 S2 N 19637 Saussurea weberi Weber saussurea G2G3 S2 N 19637 Saussurea weberi Weber saussurea G2G3 S2 N 19637 Saussurea weberi Weber saussurea G2G3 S2 N Copyright © 2018. Colorado State University. Colorado Natural Heritage Program. All Rights Reserved. Print Date 3/3/2018 2 Level 4 Potential Conservation Area (PCA) Report Name Mosquito Range Site Code S.USCOHP*375 19637 Saussurea weberi Weber saussurea G2G3 S2 N 19684 Ptilagrostis porteri Porter feathergrass G2 S2 N 19684 Ptilagrostis porteri Porter feathergrass G2 S2 N 19684 Ptilagrostis porteri Porter feathergrass G2 S2 N 19895 Braya humilis alpine braya G5 S2 N 19895 Braya humilis alpine braya G5 S2 N 19895 Braya humilis alpine braya G5 S2 N 19895 Braya humilis alpine braya G5 S2 N 19895 Braya humilis alpine braya G5 S2 N 19895 Braya humilis alpine braya G5 S2 N 19895 Braya humilis alpine braya G5 S2 N 20152 Eutrema penlandii Mosquito Range mustard G1G2 S1S2 Y 20152 Eutrema penlandii Mosquito Range mustard G1G2 S1S2 Y 20152 Eutrema penlandii Mosquito Range mustard G1G2 S1S2 Y 20152 Eutrema penlandii Mosquito Range mustard G1G2 S1S2 N 20152 Eutrema penlandii Mosquito Range mustard G1G2 S1S2 Y 20152 Eutrema penlandii Mosquito Range mustard G1G2 S1S2 N 20152 Eutrema penlandii Mosquito Range mustard G1G2 S1S2 Y 20152 Eutrema penlandii Mosquito Range mustard G1G2 S1S2 N 20152 Eutrema penlandii Mosquito Range mustard G1G2 S1S2 N 20152 Eutrema penlandii Mosquito Range mustard G1G2 S1S2 N 20152 Eutrema penlandii Mosquito Range mustard G1G2 S1S2 N 20190 Astragalus molybdenus Leadville milkvetch G3 S2 N 20190 Astragalus molybdenus Leadville milkvetch G3 S2 N 20190 Astragalus molybdenus Leadville milkvetch G3 S2 N 20190 Astragalus molybdenus Leadville milkvetch G3 S2 N 20190 Astragalus molybdenus Leadville milkvetch G3 S2 N 20190 Astragalus molybdenus Leadville milkvetch G3 S2 N 20190 Astragalus molybdenus Leadville milkvetch G3 S2 N 20244 Phippsia algida snow grass G5 S2 N 18585 Salix calcicola lime-loving willow G4G5 S1 N 20244 Phippsia algida snow grass G5 S2 N 20244 Phippsia algida snow grass G5 S2 N 20244 Phippsia algida snow grass G5 S2 N 20244 Phippsia algida snow grass G5 S2 N 20244 Phippsia algida snow grass G5 S2 N 20244 Phippsia algida snow grass G5 S2 N 20266 Oxytropis parryi Parry's crazy-weed G5 S1 N 21234 Draba streptobrachia Colorado Divide whitlow-grass G3 S3 N 21234 Draba streptobrachia Colorado Divide whitlow-grass G3 S3 N 21234 Draba streptobrachia Colorado Divide whitlow-grass G3 S3 Y 21234 Draba streptobrachia Colorado Divide whitlow-grass G3 S3 N 21234 Draba streptobrachia Colorado Divide whitlow-grass G3 S3 N 21234 Draba streptobrachia Colorado Divide whitlow-grass G3 S3 N 21874 Eriophorum altaicum var. neogaeum Altai cottongrass G4?T3T4 S3 N 21874 Eriophorum altaicum var. neogaeum Altai cottongrass G4?T3T4 S3 N 22774 Parnassia kotzebuei Kotzebue's grass-of-parnassus G5 S2 N 22774 Parnassia kotzebuei Kotzebue's grass-of-parnassus G5 S2 N Copyright © 2018. Colorado State University. Colorado Natural Heritage Program. All Rights Reserved. Print Date 3/3/2018 3 Level 4 Potential Conservation Area (PCA) Report Name Mosquito Range Site Code S.USCOHP*375 23377 Draba oligosperma woods draba G5 S2 N 20071 Oeneis polixenes Polixenes Arctic G5 S3 N 20071 Oeneis polixenes Polixenes Arctic G5 S3